One reason is because all corners must consist of at least two pieces of guttering that are affixed together.
Rain gutter corner leaking.
Pull it off the gutter with your fingers or a pair of needle nose pliers.
And the seam where they meet is a natural weak point in the system.
Corners are the places where leaks will most likely form.
You re wise to address leaking gutters before disrepair causes costly damage to your home.
The purpose of all rain gutters is to move water away from the base of your house.
Second story gutter corner leaks might not be easy to spot from the ground.
If you notice that there is still water leaking add putty on the area of the gutter leak.
Repair leaking joints with silicone caulk.
You cannot add more caulking to old.
When they fail to do.
Ask your third guy to use butyl sealant or a tar based asphalt sealant and spread it at least 1 past the corner on each side.
You need to remove the old caulking.
Why gutter corners are troublesome.
If the putty completely solidified water should not be able to go through it.
Also have him check to see if the eavestrough has sufficient slope to allow water to flow quickly toward the downspouts.
Leaking at the corners may be a sign of standing or accumulating water.
Remove the old silicone caulk from the joint connection.
The bond will not be permanent and the leak will eventually return.
You first need to clean your gutters thoroughly.
To make sure that you have completely repaired your gutter pour water down your gutter then check if there is water leaking from the crack.
If you have a little standing water try to dam it up away from the corner using a sponge or an old rag.